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09-04-2012, 06:40 PM   #16
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QuoteOriginally posted by ducdao Quote
I can say the same about human saliva, plus it's free and environmental friendly
I hear K-9 saliva is even better.

09-04-2012, 06:52 PM   #17
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QuoteOriginally posted by Ex Finn. Quote
I hear K-9 saliva is even better.
LOL, didn't know Pentax's upcoming camera has a new feature - produces saliva
09-04-2012, 11:48 PM   #18
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Although I have yet to remove fungus from a lens, I have used 90% Isopropyl Alcohol as well as lighter fluid for cleaning elements. I prefer these over straight water to prevent spots. I apply with a cotton tip lightly then quickly polish with clean microfibre lens cloth. I have used it on the K series lens with no sign of damage both to the element or the colour rendering of the lens. It works really well for removing oily finger prints.

Also for reference there is a database for quite a number of common pentax lenses and their diassembly guides HERE
09-05-2012, 07:00 AM   #19
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jford -
hmmm... you are right, for the the refractive behavior, how can I ensure if it's ok?

anyway, here is what I did: i used it on right part of the broken glass and use the hydrogen peroxide on the left.

by turning the glasses in different angles, the glass showed different reflection colors on its surface and I couldn't tell differences.

I thought it's good enough to tell if the coating is damaged or not. no?

and here is another interesting link:
Fixing a SAMYANG 500mm f8 mirror lens with plenty of fungus

He used a hand cream to clean fungus trace. how did the hand cream work in this case?

09-05-2012, 07:10 AM   #20
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chaos_realm, thanks for the link to the diassembly guides.
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